Heel lasting machine

ABSTRACT

A HEEL LASTING MACHINE HAVING A LATERALLY SHIFTABLE LAST SUPPORT FOR BRINGING THE HEEL OF A SHOE ASSEMBLY INTO PROPER RELATIONSHIP WITH RESPECT TO HEEL WIPERS, A TOE REST THAT IS MOVABLE INTO ENGAGEMENT WITH THE VAMP OF THE SHOE ASSEMBLY AFTER THE SHOE ASSEMBLY HAS BEEN CLAMPED BETWEEN THE LAST SUPPORT AND A HOLD-DOWN AT A LEVEL SUITABLE FOR HEEL WIPING, AND A CEMENT SPRAYING NOZZLE THAT IS SWINGABLE THROUGH AN ADJUSTABLE ARC TO SPRAY CEMENT INTO THE ANGLE BETWEEN THE HEEL PORTION OF AN UPPER   MARGIN AND AN INSOLE PRIOR TO WIPING THE UPPER MARGIN AGAINST THE INSOLE.

Oct. 5, 1971 K. F. VORNBERGER 3,609,735

HEEL LASTING MACHINE Filed May 28, 1970 19 Sheets-Sheet 1 1971 K. F. VORNBERGER 3,609,735

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HEEL LASTING MACHINE l9 Sheets-Sheet 3 Filed May 28, 1970 1971 K. F. VORNBERGER 3,609,785

HEEL LASIING MACHINE l9 Sheets-Sheet 5 Filed May 28, 1970 1971 K. F. VORNBERGER 3,609,75

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HEEL LASTING MACHINE Filed May 28, 1970 19 Sheets-Sheet 10 06L 1971 K. F. VORNBERGER 3,609,735

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HEEL LAS'I'ING MACHINE Filed May 28, 1970 19 Sheets-Sheet 16- Oct. 5, 1971 Filed May 28, 1970 19 Sheets-Sheet l7 Oct. 5, 1971 Filed May 28, 1970 K. F. VORNBERGER HEEL LASTING MACHINE l9 Sheets-Sheet 1 8 1971 K. F. VORNBERGER 3,609,785

HEEL LASTING MACHINE Filed May 28, 1970 19 Sheets-Sheet 19 F/G-ZOA United States Patent 3,609,785 HEEL LASTIYG MACHINE Karl F. Vornberger, Tewksbury, Mass., assignor to Jacob S. Kamborian, West Newton, Mass. Filed May 28, 1970, Ser. No. 41,500 Int. Cl. A43d 21/00 U.S. Cl. 1212.5 23 Claims ABSTRACT OF THE DISCLOSURE A heel lasting machine having a laterally shiftable last support for bringing the heel of a shoe assembly into proper relationship with respect to heel wipers, a toe rest that is movable into engagement with the vamp of the shoe assembly after the shoe assembly has been clamped between the last support and a hold-down at a level suitable for heel wiping, and a cement spraying nozzle that is swingable through an adjustable arc to spray cement into the angle between the heel portion of an upper margin and an insole prior to wiping the upper margin against the insole.

In a heel lasting operation, wherein the heel portion of the margin of an upper is wiped against an insole by symmetrically disposed wiping means, it is desirable that the heel portion of a shoe assembly, that comprises a last having the insole on its bottom and the upper mounted thereon, have its line of symmetry coincide with the line of symmetry of the wiping means. One aspect of the invention relates to a machine for effecting this coincidence. The machine comprises a support on which the shoe assembly is supported for lateral swinging movement and a pair of sensing mechanisms so located that a lateral swinging of a shoe assembly to a position that causes actuation of a selected sensing mechanism acts to urge the support laterally to a position wherein the desired coincidence takes place.

It is conventional in a heel lasting operation to clamp the shoe assembly bottom-up between a last support and a holddown at a level suitable for wiping and to support the vamp of the shoe assembly at this level by a toe rest. The last support, hold-down and toe rest cooperate to restrain the shoe assembly from movement during the heel wiping operation. A second aspect of the invention relates to an arrangement for bringing the toe rest into engagement with the vamp, after the shoe assembly has been clamped between the last support and the holddown, regardless of the heightwise dimension of the vamp. This is accomplished by incorporating in the machine a control for raising the toe rest into engagement with the vamp under a yieldable force after the shoe assembly has been clamped between the last support and the holddown.

In the drawings:

FIG. 1 is a side elevation of the machine;

FIG. 2 is a front elevation of the machine taken on the line 2-2 of FIG. 1;

FIG. 3 is a side elevation of a platform that mounts the last support and the toe rest;

FIG. 4 is an elevation of a post that supports the platform for heightwise movement;

FIG. 5 is a view taken on the line 5-5 of FIG. 3;

FIG. 6 is a view taken on the line 6-6 of FIG. 3;

FIG. 7 is a side elevation of a heel wiper operating mechanism;

FIG. 8 is a plan view taken on the line 8-8 of FIG. 7;

FIG. 9 is a side elevation of an applicator-hold-down unit;

FIG. 10 is a plan view taken on the line 10-10 of FIG. 9;

FIG. 11 is an elevation of the cement applying mechanism;

FIG. -12 is a view taken on the line 12-12 of FIG. 11;

FIG. 13 is a view taken on the line 13-13 of FIG. 11;

FIG. 14 is a view taken on the line 14-14 of FIG. 12;

FIG. 15 is a section of a motor for swinging the nozzle taken on the line 15-15 of FIG. 9;

FIG. 16 is a section of a cement melting and pumping mechanism;

FIGS. 17 and 18 are schematic representations of portions of the machine control circuit;

FIG. 19 is a representation of the shoe assembly as it applears in the machine at the beginning of the machine cyc e.

FIG. 19A is a view taken on the line 19A-19A of FIG. 19;

FIG. 19B is a view taken on the line 19B-19B of FIG. 19;

FIG. 20 is a representation of the shoe assembly as it appears in the machine during the cement spraying operation; and

FIG. 20A is a view taken on the line 20A-20A of FIG. 20.

Referring to FIGS. 1 and 2, the machine includes a shoe assembly supporting mount 10 and heel Wipers 12. The machine is inclined so that the plane in which the wipers lie is inclined from the horizontal and the longitudinal axis of the mount 10 is inclined from the vertical to facilitate accessibility of the machine to the operator. For ease of explanation, the plane in which the wipers 12 lie will be considered to be horizontal and the longi tudinal axis of the mount 10 will be considered to be vertical. In operating the machine, the operator stands to the left of the machine as seen in FIG. 1, and directions that extend toward the operator will be described as forward while directions that extend away from the operator will be described as rearward.

Referring to FIGS. 1-4, the machine frame includes a base 14 to the lower end of which is secured an air operated motor 16. the piston rod 18 of the motor 16- is connected to a vertically extending post 20 that is slidably guided in the base 14. A key 22, secured to the base 14, is received in a slot 24 in the post 20 to preclude the post from movement about its vertical axis. The upper end of the post 20 is received in a recess in a platform 26 and is secured to the platform by a pin 28. A base 30 is slidably mounted on the platform 26 for forward-rearward movement. A screw 32, rotatably mounted in the platform 26, is threadly received in a hanger 34 that depends from the base 30. The screw is connected to a sprocket 36 that is rotatable in a flange 38 that is secured to the front of the platform 26. A sprocket 40, also rotatably mounted in the flange 38, is connected to the sprocket 36 by a chain 42. The sprocket 40 is connected to a reversible electric motor 44 that is also mounted to the flange 38. Thus it can be seen that the base 30 and the parts carried thereby may be adjusted forwardly and rearwardly in the platform 26 by the motor 44.

Referring to FIGS. 3 and 5, a column 46 is mounted to and extends upwardly of the base 30. An air actuated motor 48 is mounted to the column 46. The piston rod 50 of the motor 48 is secured to a bar 52 that is mounted for heightwise movement in the column 46. A beam 54 is secured to the top of the bar 52 and extends laterally of the bar on opposite sides thereof. A block 56 is slidably mounted on each end of the beam 54 for inward-outward movement. A link 58 is pivoted at its outer end to each block 56. The inner end of each link 58 is pivoted by a pin 60 to the periphery of a hub 62 that is secured to a gear '64. The hub 62 and the gear 64 are rotatably mounted on the bar 52, and the pins 60 are mounted to diametrically opposed portions of the periphery of the 

